/* ----------------------------------------------------------------------------
   libconfig - A library for processing structured configuration files
   Copyright (C) 2005-2014  Mark A Lindner

   This file is part of libconfig.

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public License
   as published by the Free Software Foundation; either version 2.1 of
   the License, or (at your option) any later version.

   This library is distributed in the hope that it will be useful, but
   WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with this library; if not, see
   <http://www.gnu.org/licenses/>.
   ----------------------------------------------------------------------------
*/

#include "strbuf.h"

#include <stdlib.h>
#include <string.h>

#define STRING_BLOCK_SIZE 64

/* ------------------------------------------------------------------------- */

char *strbuf_release(strbuf_t *buf)
{
    char *r = buf->string;
    memset(buf, 0, sizeof(strbuf_t));
    return (r);
}

/* ------------------------------------------------------------------------- */

void strbuf_append(strbuf_t *buf, const char *text)
{
    static const size_t mask   = ~(STRING_BLOCK_SIZE - 1);
    size_t              len    = strlen(text);
    size_t              newlen = buf->length + len + 1; /* add 1 for NUL */

    if (newlen > buf->capacity)
    {
        buf->capacity = (newlen + (STRING_BLOCK_SIZE - 1)) & mask;
        buf->string   = (char *)realloc(buf->string, buf->capacity);
    }

    strcpy(buf->string + buf->length, text);
    buf->length += len;
}

/* ------------------------------------------------------------------------- */
